Celtics.com released a terrific mini-documentary about Jared Sullinger's back injury and recovery on Friday, which you should definitely watch as soon as you're done reading this post.

A few of the best anecdotes are discussed below, but you should watch the whole thing assuming you have eight minutes to spare.

As strength and conditioning coach Bryan Doo admitted, he was "a doubter in Jared as a person" before meeting him. That sounds harsh, but Doo meant he watched Sullinger during his time at Ohio State and questioned his work ethic. Doo saw what everyone else did -- a supremely skilled big man who carried too much weight and could have dominated even more thoroughly with a body fat percentage more fitting of a star athlete.

"I'd watch ESPN, and I remember watching and being like, oh, look at this kid Sullinger," said Doo. "They say he has a bad back, I wonder if he takes care of it. Look at his body. His body's terrible."

Ouch.

But Sullinger dispelled all of Doo's doubts once he landed with the Celtics.

"Once we drafted him, I got to know him," Doo said. "I realized wow, I was wrong. This kid's actually a good kid, puts the time in. It's just he has a bad back. But now that that's fixed, I don't see why he won't continually do it and just keep getting better and better."

So his back is fixed? Like, forever?

On the night he aggravated his bad back enough to need surgery, Sullinger said, he couldn't sit up or stand, and could barely walk. He'd worked out all season in an effort to keep his back issues in check, but there was a reason 20 players (several of them less-talented and accomplished) were selected before him on draft night. Teams feared that he would ultimately need surgery, and believed it could come at any time.

Obviously, they were correct. As Sullinger explained his ability to move that night, "I was just like a frozen bear."

Best. Non-Kevin Garnett. Analogy. Ever. Maybe.

Sullinger's father, Satch, seems like a pretty cool dude. He regularly interacts with fans on Twitter, spits basketball knowledge at various times throughout the day (he once won a national high school coach of the year award, so he has plenty of knowledge to spit), and always preaches the value of teamwork over all else.

He also keeps a taped Stephen A. Smith television segment to help motivate his son. I'll let Jared explain:

"My dad has a recorded ESPN First Take. You've got Stephen A. Smith telling me, or telling people, that he wouldn't take me first round (or) second round, I wasn't good enough to play in the NBA," said Jared Sullinger. "To be starting sometimes next to Kevin Garnett, and then playing major minutes, I thought that was a sign that I can play in this league."

Hold on, let me look up the rebounding and on-off court statistics. Okay. The Celtics were 4.2 points per 100 possessions better with Sullinger on the court, according to Basketball-Reference.com. He also would have led the team in rebounding rate, except that Shavlik Randolph chases after every board like it insulted his mother. As a rookie, Sullinger earned big minutes in head coach Doc Rivers' rotation, which is almost impossible. He also drew all types of praise from the Boston veterans, who were impressed from Day 1 by the rookie's basketball knowledge and work ethic.

Assuming Sullinger's back is "fixed" as the Celtics hope, I think it's safe to say Stephen A. Smith got this one wrong.

I mentioned the 20 players taken before Sullinger in the draft. Asked what his message would be for all his critics, Sullinger had this to say:

"They made a mistake, I think," he said. "My ability to rebound, shoot the basketball and just give my body to the team by taking charges or diving on loose balls -- I'm a glue guy, in my eyes. And they missed out, but at the same time it's a blessing to be here, so I hope they enjoy their journey because I'm enjoying mine."